Circuit-breaker for electric ignition devices.



A. R. MDSLER. I CIRCUIT BREAKER FOR ELECTRIC IGNITIONDEVIGES.

APPLICATION FILED JAN. 15, 1906,

Patented Oct. 29, 1912.

5111012101- Ma 77. M

UNITED STATES PATENT,

amnion nimosmn, or NEW ORK, N. Y., 'assrenon To a. it. irosnnn & 60.; orimw I A 0BPoBAr1oN or NEW3YORK. i

cinculr-nnnaxna FoniaLEe'rn'Io IGNITIONFDEVICES 1,042,814. Q $r 9 of Letters Patent-15 Patented0ct,.-29, 1-91 2.

citizen o'fthe Unitedstates, and residentof r the borou hof Munhattan, inthe' city and,

State. of ew: York, have invented a, new and useful;Improvementin Circuit-Breakers for Electric; Ignition Devices,of which the following is a specification.

\ My invention consists in certain improvements in circuit breakers for electric ignition devices which are more especially adapted for use in tion 'ofthe gas in explosive gas engines. The-object of myinventionds to provide certain -iin'1provements in the construction, yform-fand1arran ement of the several parts of the circuit] reakerwhereby the wear --upon-the parts is -reduced ,to -a minimum, thus insuring the. production of a circuit breaker which-'willbe longer, alive and -which themaking and breaking of the CIT- tact on thefl'stud 4.

'1 cuit is'assure'dr A' further object is provide a! circuit a. -breaker-- in;.,whicli;ithe rotary contact is '25 moujnted'; eccentrically .on the rotary shaft 1 whereby thercont act may be causedto constantly present new surfaces'fto the different yielding contacts carried by the" casing, thus I preventing undue, wear. on the eccentric rotary o ct at. ny one po nt-ff A further obj ct ,s to provide the above-character in whichthe longer or shorter engagement of the yielding contact with the rotary contact isobtained by the 85 adjustment of the yielding contact.

A still further'object is to provide a device in which ant-ifriction bearings are in- Y terposedbetween the rotary shaft and casing and between the rotary contact and the 0 eccentric shaft stud. I g

- In the accompanying drawings, Figure 1 represents the circuit breaker in end eleva-. tion, Fig. 2 is a central longitudinal section through the same, theeccentric shaft stud 4 and a portion of the shaft being shown in side elevation, and Fig. '3 is a detail end view of the rotary shaft indicating more clearly the position of the eccentrically argpd'shaft stud.

ran j T e'portion of the rotary shaft which ex- -'tends into the casing of the circuit breaker,

is denoted by 1 and it may be secured to the other portion 2 of teningdevices 3.

vided with an ecoentrically ima niearanuar 15,1906. Seria1No.296',280.

4- projecting a short A rotary contact 5 is mounted on th Stlld :i:, WhlCh contact has a cylindrical f 'eriplig connectionwith the igni-s a device of I the shaft by suitable fas This shaft portion 1 is pro-- arranged stud.

arranged in position to successive y e the yielding contact point of thecasinhereinafter described. a

An antifriction bearing is interposed--between the rotary contact 5 and the stud-*4,

which bearingis constructed and arranged as follows. "An annular row of balls-6 is arranged n a circumferential;groove 7 in the stud The rotarycontact'5is1ofcup "form and the balls arelheld in positiombetween the inclined bottom 8 of the cupand the inclined'end 9" of a, screw-threaded'cap 10 engaged with the contact 51 Thebearing fay beadjusted. by tightening or loosening the cap 10 as is obvious.

It will be seen that the circumferential groove 7 in combination with" the vballs 6, serves to properl position the rotary con- The casing which? carries the yieldin contacts of the circuit breaker is constructed and arranged as follows, A hub ll sure" v a e:

" elt" rounds the rotary shaftand is spaced there-i from which hubisprovided with a circumferential flange '12to which is securedagcy- I lindrical: shell;13 of insulating material such; for-instance, as vegetable fiber. ;;In

the "present instance, I have shown this' she'll; V

as secured to the {flange 12 by means of; a pluralityof .fastening'screws- 14. A glass front 15 is secured. in the shell between a locking ring '16 and an annular shoulderrl'l in the inner wallof ,the shelL' X l-; f

An' antifriction bearingjis interpo edfibt" tween the casing and the rotary shaft, which. bearing comprises two rows of balls'18, 19,

' the balls18 being locatedfin the circumferential groove 20 in the shaft and the balls 19 being engaged with the periphery of the shaft without the use of aegroove. Inner intermediate and outer bearing rings 21, 22, 23, are inserted in the huli\11, the balls 18 being engaged by the adjacent inclined walls'24, 25, of the rings 21, 22, and the balls 19 being engaged by the inclined .adjacent walls 26, 27 of the rings 22, 23. A cap 28 has a screw-threaded engagement with the inner wall of the hub 11 of the casing and bears against the outer bearing ring 23 so that the bearings may be adjusted to the proper degrewby the screwing and unscrewing of thejcap 28.

threaded engagement in the wall of the shell 13, said plug being provided with a locking nut arranged to clamp the plug in any desired adjustment. This plug 29 is provided with a socket 31 having a contracted mouth 32.

A yielding contact comprises an enlarged portion 33 fitted to slide in the socket 31 and reduced end portions 34, 346 one reduced end portion 3st projecting inwardly through'the contracted mouth 32 and the other reduced end portion 34? projecting toward the bottom of the socket 31. A spring 35 is located within the socket 31 in position to yieldingly hold the contact at the limit of its inward movement toward the rotary contact.

- In operation, as the shaft is rotated, the eccentric-ally mounted rotary contact will be caused to successively engage theyielding contacts, the engagement of the contacts serving to keep the rotary contact constantly moving, thus causing it to present new surfaces to the yielding contacts. The length of time in which the rotary contact is in engagement with each of the yielding contacts may be accurately determined by screwing the plugs 29 a greater or lesser distance into the shell of the casing. Furthermore, the ant-ifriction bearing between the rotary contact and the eccentrically arranged shaft stud is directly in the plane of the yielding contacts so that the friction between the I rotary contact and the stud reduced to a posed between the rotary shaft and the easing also serves to not only reduce the friction between the shaft and the casing but to properly position the casing so that its yielding contacts will be at all times held accurately in the plane of the antifriction bearing for the rotary contact.

hat I claim is:

1. A circuit breaker comprising a rotary shaft having an eccentrically arranged stud projecting from the end ,of the shaft and provided with a circumferential groove, a rotary contact mounted on the stud and provided with an internal groove, an annular row of balls interposed between the rotary contact and stud and located in the said grooves for positioning the rotary contact on said stud, a casing, and a longitudinally sliding springactuated contact carried thereby in position to be directly engaged by the rotary contact.

2. A circuit breaker comprising a casing, a contact carried thereby, a rotary shaft havin a stud eccentrically arranged thereon provi ed with a circumferential groove, a rotary contact mounted on the said stud and provided with an internal groove, a row of balls located between the contact and stud in said grooves for positioning the rotary contact with respect to the contact carried by the casing, the said shaft having a circumferential groove and the said casing having an internal groove, and a plurality of rows of balls interposed between the shaft and easing, one of said rows of balls being located in the grooves in the shaft and ca'sing for properly positioning the casing on the shaft. i

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this 10th day of January-1906.

ARTHUR R. MOSLER.

Witnesses FREDK. HAYNES, F. GEORGE BARRY. 

